Listing "Earth Articles" from 71 to80

Electronic Computer
Electronic computer represent the most advanced achievement of modern science...
by Manpreet
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X-Ray
In 1895 Roentgen discovered the rays which are called after him and which he nicknamed "X-rays" because he did not what they were or where they came from...
by Manpreet
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Wonder World Under Water [II] - One-Celled Animals
Our body is made up of many organs, like the stomach, the liver, the heart, the brain, kidneys , lungs...
by B.F. Chhapgar
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Wonder World Under Water [I]
Nearly three-quarter of our earth is covered by water...
by B.F. Chhapgar
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Vaccines
Jenner had heard of a popular belief in Gloucestershire that a person had accidentally contracted pustules by milking a cow infected with cowpox...
by Manpreet
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Invention of Helicopter
In 1876, Enrico Forlanini fitted a gas-driven engine to a machine which rose to a height of 13m after a vertical take-off from the park of Milan...
by Manpreet
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Invention of Electromagnetic Machines
Electricity has been known to man since ancient times...
by Manpreet
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Invention of Compass
In the second century BC the compass was already known in China...
by Manpreet
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Invention of Combustion-Engine
Modern civilization is entirely dependent on the internal combustion engine...
by Manpreet
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Invention of Paper
Once the alphabet ha been invented, man could write; but what was he to write on?...
by Manpreet
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 • Thanksgiving Day Coloringbook
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